ウエダ　ヨシオ   Ueda Yoshio   上田　良夫    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2018/01
形態種別	論文
査読	査読あり
標題	Spectroscopic study of hydrogen reflection at modified tungsten surface
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Fusion Engineering and Design
掲載区分	国外
巻・号・頁	136,pp.100-105
著者・共著者	Kenta Doi,Heun Tae Lee,Nozomi Tanaka,Hitoshi Yamaoka,Yoshio Ueda,Motoi Wada
概要	Doppler-spectroscopy study of hydrogen atoms reflected from a fuzzy tungsten (W-fuzz) surface was performed to investigate the effects of the W surface morphology upon the hydrogen particle reflection in low energy region less than 300 eV. The reflected atoms from the W-fuzz surface contributed to a tail part of Hα spectra measured in the vicinity of the surface negatively biased in a magnetized hydrogen plasma. Time evolution of the spectral intensity exhibited an increase of the hydrogen particle reflection coefficient correlated to the continuous removal of the porous fuzz structure due to the hydrogen-plasma bombardment. The initial particle reflection coefficient of hydrogen atoms from the porous W-fuzz surface was 50% lower in comparison to a smoother W surface following the removal of the fuzz structure.
DOI	10.1016/j.fusengdes.2018.01.001
ISSN	0920-3796